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    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    91 Main St Marlborough, MA 01752-5293

    • Office buildings
    • 16,952 SF
    • 0.48 lot acres
    OFF-MARKET
    Value Estimations
    $325,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US38-1597614
    The Realmo ID is a unique identifier assigned to every property, incorporating country codes and precise geo-coordinates for 300x300-foot land blocks. It enables standardized data collection and seamless integration of disparate sources such as ownership, tax, title data and physical specifications. By aggregating current and historical records, the Realmo ID powers advanced analytics and delivers deep, verifiable insights for real estate professionals.

    Current Use by Public Records

    • Office buildings

    Property Details for 91 Main St

    Year built
    1909
    Construction
    MASONRY/CONCRETE MASONRY UNITS (CMUS)
    Lot size
    0.48 lot acres
    Property size
    16,952 SF
    Property type
    Office buildings
    APN
    MARL M:070 B:024 L:000
    APU
    MARLM070B024L000

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      ML approach
      $325,000

    Get a detailed, property-specific valuation — fast and free

    Location Insight

    • Map
    • Local Demand
    City
    Marlborough
    County
    Middlesex
    State
    Massachusetts
    Longitude
    -71.5461
    Latitude
    42.3475
    CBSA code
    14460
    CBSA name
    BOSTON-CAMBRIDGE-QUINCY, MA-NH METROPOLITAN STATISTICAL AREA

    Property Tax & Assessments

    Tax date
    Tax Amount
    Assessed Land Value
    Assessed Improvement Value
    Total Assessed Value
    Applied Tax Rate
    Land Market Value
    Improvement Market Value
    Total Market Value
    2024
    $26,848
    $308,500
    $1,211,800
    $1,520,300
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $630,000
      85,388 SF

      400 Nickerson Rd

      OFFICE BUILDING • 85,388 SF
      400 Nickerson Rd, Marlborough, MA 01752-4717
      View Details
    • Value Estimation
      $935,000
      110,384 SF

      11 Apex Dr

      OFFICE BUILDING • 110,384 SF
      11 Apex Dr, Marlborough, MA 01752-1858
      View Details
    • Value Estimation
      $775,000
      71,408 SF

      201 Boston Post W Rd

      OFFICE BUILDING • 71,408 SF
      201 Boston Post W Rd, Marlborough, MA 01752-4667
      View Details
    • Value Estimation
      $825,000
      112,548 SF

      300 Boston Scientific Way

      OFFICE BUILDING • 112,548 SF
      300 Boston Scientific Way, Marlborough, MA 01752-1291
      View Details
    • Value Estimation
      $365,000
      81,169 SF

      220 Donald Lynch Blvd

      OFFICE BUILDING • 81,169 SF
      220 Donald Lynch Blvd, Marlborough, MA 01752-4708
      View Details
    • Value Estimation
      $290,000
      3,889 SF

      21 Cotting Ave

      OFFICE BUILDING • 3,889 SF
      21 Cotting Ave, Marlborough, MA 01752-2942
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      10,000 SF

      Marlborough Office Building Opportunity

      Freestanding office building or condos for sale or lease.
      230 Maple St, Marlborough, MA 01752
      View Details
    • $750,000

      Office Condo For Sale

      4,375 Sq. Ft Office Condo For Sale/Lease.
      28 Lord Rd, Marlborough, MA 01752
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    • Contact for pricing
      3,048 SF

      Professional Suites in Desirable Location

      Professional suites available in a convenient Marlborough location off Route 20.
      74 Main St, Marlborough, MA 01752
      View Details
    • Contact for pricing
      5,374 SF

      Marlborough Office & Flex Space

      Office and flex space in a high-visibility Marlborough location.
      7-9 Mechanic St, Marlborough, MA 01752
      View Details
    • $3,000,000

      Industrial Condo with Office Space

      15,000 SF industrial condo with 5,625 SF office.
      401 Cedar Hill St, Marlborough, MA 01752
      View Details
    • Contact for pricing
      29 SF

      29.14 Acre I-290 Frontage Land

      29.14 acre lot with I-290 frontage in Marlborough, MA.
      582 Robin Hill St, Marlborough, MA 01752
      View Details

    Similar Nearby for Lease

    • $18 SF/Yr
      14,186 SF

      Marlboro Office Building For Rent

      Two-story office building near retail and entertainment.
      313 Boston Post Rd W, Marlborough, MA 01752
      View Details
    • Contact for pricing
      161,300 SF

      Marlborough Office Park with Amenities

      Three-building office park with amenities and highway access.
      2 Mount Royal Ave, Marlborough, MA 01752
      View Details
    • $21 SF/Yr
      1,552 SF

      Class A Office Space Available

      Six-story Class A office building near I-495 and Route 20.
      33 Boston Post Rd, Marlborough, MA 01752
      View Details
    • $17 SF/Yr
      204 SF

      Marlborough Office Building For Lease

      62,610 SF office building with highway visibility.
      67 Forest St, Marlborough, MA 01752
      View Details
    • Contact for pricing
      7,415 SF

      Class A Office Building

      76,164 SF Class A office building for rent.
      325 Donald Lynch Blvd, Marlborough, MA 01752
      View Details
    • Contact for pricing
      31,511 SF

      Marlborough Technology Park Office Space

      Class A office space in a premier technology campus.
      400 Nickerson Rd, Marlborough, MA 01752
      View Details
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    91 Main St
    Marlborough, MA 01752-5293
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    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
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